General National Id Bulgaria_09 Site name Srebarna Nature Reserve Summary A linking canal with a lock, constructed in 1994, enabled the artificial respiration of Srebarna Lake in the Bulgarian border with Romania. Thanks to this canal, water from the Danube can now flow into the lake every year. Light or indepth? Light NUTS Code Северен централен (Severen tsentralen) RBD code BG1000 Transboundary 0 Data provider REC Source(s) Srebarna Nature Reserve NWRM(s) implemented in the case study Elimination of riverbank protection Longitude 27.07305 Latitude 44.10972 Site information Climate zone warm temperate dry Mean rainfall 547 Mean rainfall unit mm/year Average temperature 12,8000001907349 Average imperviousness 0,200000002980232 Type Case Study Info Average slope range 0.02 Vegetation class Marsh plants Monitoring maintenance Monitoring impacts effects 1 Performance Performance impact estimation method Catchment outlet Performance impact estimation information Measurment of the water level; Monitoring of the bird species Design & implementations Application scale Field Scale Installation date 1994 Age 10 Performance timescale 5 - 10 years Area (ha) 60200 Size 638 Size unit ha Max water retention capacity 14 Max water retention capacity unit mio m3/month Constraints Interrupted connection with Danube River, Distance fom the main river Favourable preconditions Designated to Strict nature reserve Design contractual arrangement Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments Lessons, risks, implications... Key lessons Hydrotechnical restoration of Srebarna is successful concerning the local biophysical impacts: improved water level, decline in eutrophication trends, improved biodiversity. However the impacts at river basin level are insignificant or difficult to assess due to the scale difference. Success factor(s) Success factor type Success factor role Comments Financing Financing type Comments Barrier Barrier type Barrier role Comments Driver Driver type Driver role Comments Financing share Financing share type Share Comments Policy, general governance and design targets Policy description Decrease of the water level, Eutrophication, Sediments accumulation, Part of wider plan 0 Policy target Target purpose Runoff control Improved Biodiversity Increase Water Storage Policy pressure Pressure directive Relevant pressure Policy area Policy area type Policy area focus Name Comments Policy impact Impact directive Relevant impact Policy wider plan Wider plan type Wider plan focus Name Comments Policy requirement directive Requirement directive Specification Socio-economic Ecosystem improved biodiversity 1 Information on Ecosystem improved biodiversity Maintaining wetland for endangered bird species Ecosystem provisioning services 0 Ecosystem impact climate regulation Increased permanent biomas Biophysical impacts Retained water 14 Retained water unit mio m3/year Increased water storage 4 Increased water storage unit mio m3/year Water quality overall improvements Positive impact-WQ improvement Soil quality overall soil improvements N/A info Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL